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(No Model.) 5 sheets-shet 1. C. B. OOTTRELL. vGIEIROMATIG PRINTING MACHINE.v

No. 412,878. Patented Oct. 15, 1889.

Invezr:

WKN/aise@ Ma/m `(No Mode1.\ 5 Sheets-Sheet 2. C. B. COI'TRELL.

GHROMATIG PRINTING MACHINE.

Patented Oct. 15,1889.

N. PETERS, Phublilhagmphcr, Wnhngtun, D,C.

`(No Model.) 5 Sheets-Sheet 3.

C. B. GOTTRELL.l GHRUMATIC PRINTING MAGHINB.

(No Mdel.) 1 5 sheets-sheen 4.

C. B. COTTRELL.

A HRMTIG PRINTING' MACHINE.

N0. 412,878. vPadzenized Oct. 15, 1889).

@O O N8 O O 5 Sheets-Sheet 5.

C. B. OOTTRELL. GHROMATIG PRINTING MAGHINE.

(No Model.)

No. 412.878. Patented Oct. 15, 1889.

@Cows Wfzease@ @iff www H. PETERS, Phulo-Lthugmnher, Walhlngon, D. C4

turn STATES Arent rrrcn.

CALVERT B. COTTRELL, OF VVESTFRLY, RHODE ISLAND.

CHRONiATlC-DRINTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 412,878, dated October 15, 1889.

Application filed March 25, 1889. Serial No. 304,661. (No model.)

To all whom it iii/ay concern:

Be it known that I, OALvERr B. COTTRELL, a citizen of the United States, residing at Testerly, in the county of VaShington and State of Rhode Island, have invented a new and useful Improvement in Chromatic-Printing Machines, of which the following is a specification, reference being had to the accompanying drawings. y

This invention relates to presses in which there are employed two or more impressioncylinders and a reciprocating bed common to all of said cylinders and adapted to carry a numberof printing-forms corresponding with the number of cylinders and the number of colors to be printed. Such a machine maybe of what is known as the stop-cylindertype or of the two-revolution-cylinder type, or its cylinders may complete two revolutions and then stop for a time during each reciprocating movement of the bed back and forth. The bed may be driven by a crank or by the Napier or mangle-rack movement.

I will now proceed to describe the improvement with reference to the drawings, and afterward point out its novelty in claims.

The machines illustrated in the drawings are of the kind last hereinabove mentionedthat is to say, its cylinders have two revolutions and afterward stop for a time during each reciprocating movement of the bed back and forth.

Figure 1 is a side View of a machine with two cylinders for printing in two colors. Fig. 2 represents a central longitudinal vertical section of this machine, omitting a portion of the framing at each end and portions of the inking apparatus. Fig. 3 represents a longitudinal view of some of the details which are not so well shown in Fig. 2. Fig. 4 is a plan view corresponding with Fig. 2. Figs. 5 and 6 are diagrams of the cylinders, representing the bed at opposite ends of its stroke. Fig. 7 is a diagram representing the arrangement of three cylinders in one machine with abed common to all. Fig. 8 is a detail view,which will be hereinafter explained.

Similar letters of reference designate corresponding parts in all the figures.

A, Figs. 1, 2, and a, designates the fixed framing of the machine, upon which runs the reciprocating bed B, and upon which are erected the standards A A2, containing the bearings for the shafts s s2 of the two impression-cylinders C C2, the said standards and their bearings being at such distances apart as to leave sufficient space between them to permit a sheet, which is received on the first of said cylinders C by its grippers t 'from a feedboard U and afterward transferred to thc other cylinder C2 to be printed first under the said cylinder C with one color on one of two forms T T2 on the bed B and afterward under the other cylinder C2 with another color on the other of the said forms.

Near the places provided on the bed B for the two forms T T2 racks B B2 are provided for the purpose of gearing with gears c 'c2 on the shafts of the cylinders during printing. There may be such racks on both sides of the bed and such gears at both ends of the cylinders. The racks B B2 and the gears c c2 insure the two cylinders being driven at a surface speed exactly corresponding with that of the bed during printing. The bed is represented as having imparted to it the necessary reciprocating motion by means of the common Napier or man gle-rack motion. The bed has depending from it hangers B3, upon which the rack 1341s carried, the said rack engaging with a mangle-pinion B5 on a knuckle-shaft BG, which is jointed to the main shaft B7 of the machine upon which is the pulley for driving the machine. The cylinders C and C2 must be so geared together independently of their gearing with the bed that they will have corresponding rotary movements when out of gear with the bed. The gearing by which the cylinders are so geared together may be of any suitable kind. I have represented it as consisting of two endless racks V, gearing with spur-gears on the cylinders. These endless racks are endless chains made of toothed links, and the said racks or chains serve the additional purpose of carrying grippers w and to2 for the purpose of taking the sheets from each of said cylinders and transferring them to another or to a receiving-board U', as will be hereinafter described. The said endless chains or racks are represented as supported on wheels V and VW, carried by shafts o' odi, which work in bearings in standards V2 and Vit, the standards V2 being erected on opposite sideframes IOO of the main framing A, and those V24 being erected on the cylinder journal-boxes, and the said racks gearing with spur-gears of equal size on the two cylinders. These gears may be and are represented as the same c c2, hereinbefore described as gearing with the bed-rack. The two cylinders being thus geared together, their rotary movements will be synchronous-that is to say, made to correspond-so that exactly such movements as may be given to the cylinder C will also be given to the cylinder C2, and when the cylinder C stops the cylinder C2 will also stop. The two cylinders, besides being geared together to have synchronous rotary movements, musthave corresponding synchronous rising and falling movements, by which both are brought up to a position in which they will not gear with the bed-racks and returned to a position in which they will gear with the said racks. The mechanism applied to each of the cylinders C C2 for this purpose may be and is represented to 'be the same as that commonly employed in stopcylinder printing-presses and known as the lift mechanism, consisting of rods h, (see Fig. 2,) connected at their upper ends with the journal-boxes of the cylinders extending downward through guides on the framing and connected at their lower ends by bearingblocks h5, springs h', applied around the said rods for the purpose of lifting the boxes and the cylinders, and toggles hs, applied between said bearing-blocks and the framing for the purpose of drawing down the cylinder-boxes and the cylinders. The toggles hs are connected with a cranked rock-shaft h6, which is supported in bearings in the blocks h5. The crank h7, belonging to the firstV cylinder C', is connected by a hook-bar H with a cam-yoke d', which embraces a cam d upon the camshaft D. The cam d and the hook-bar H serve to operate the toggles belonging to the irst cylinder C', as in an ordinary stop-cylinder machine, and the toggles belonging to the second cylinder C2 are operated at the saine time in the same manner through a bar d2, which connects the crank portions k7 of the rock-shaft h6.

The means of giving motion to the first cylinder C while out of gear with the bed constitutes no part of the present invention. For the purpose of this invention any suitable means may be employed for giving such motion to the said cylintler--as, for instance, those ordinarily employed in the two-revolution cylinder presses or t'hose employed in the stop-cylinder presses in common use; but I have represented for that purpose a startinglever and sector on one side of the machine and a train of gearing on the other side of the machine, which constitute part of the sub ject-matterof my application for United States Patent, Serial No. 294,596, filed December26, 1888, and which I will now brieiiy describe. The starting-lever E is shown partly in full and partly in dotted outline in Fig. 2, in which figure also is shown the mechanism for operating the said lever; but l have also shown more plainly in Fig. 8 the upper end of the said lever and the toothed sector E* on the cylinder with which it gears. The other gearing is shown in Fig. l. represented as workin g on a iixed stud c and as driven through a horizontally-moving bar E2 by means of two cam-shaped gear-wheels E3 E4, of which E is fast upon the cam-shaft D, and E4 is pivoted to a yoke on the said bar, the said bar being connected by a gabhook E with the lower end of the startinglever. This means of imparting motion to the starting-lever constitutes part of the subjectmatter of my application for Letters Patent, Serial No. 242,233, tiled June 23, 1887.

The train of gearing hereinbefore referred to as on the other side of the machine, and which is represented in Fig. l, consists as follows: Mounted upon a fixed stud or pin f, secured in the side framing, there is a large gear-wheel F, which engages with a pinion F2 on the main shaft B7 of the machine. This pinion is of the same pitch diameter as the knuckle-gear or mangle-pinion B5; hence its pitch-line and the pitch-line of the large wheel F both have the same speed as the bed or the speed which the cylinder must have during printing. Fast to the gearwheel F is a gear-wheel F of half the diameter of the said wheel F. This gear-wheel F gears with a smaller gear-wheel F3, turning loosely on a fixed stud f3, and the said gearwheel F3 gears with another gear-wheel F4, turning on a fixed stud f4. Opposite this gear-wheel F4 there is fast to the cylinder a concentric toothed sector F5, which is capable of gearing with the said gear-wheel F4. This concentric sector F5 has a pitch radius one-half that of the cylinder-gear c. Secured to the gear-wheel F4 is an eccentric sector F, and secured to the concentric sector Fior otherwise secured to the cylinder, is an eccentric sector F7,which is the counterpart of that FG. These eccentric sectors are so arranged that they may work in gear with each other. The position of the parts shown in Figs. l and 2 is that in which the cylinders are raised out of gear from the bed-rack, the first cylinder C being in the position for taking a sheet from 4the feed-board U and the bed moving toward the right,which is the direction of the return movement after printing. The starting-lever E is in its central position and in gear with the sector E* of the cylinder, and the cams E3 E4 are about to move the starting-lever to the left, and thus turn the cylinder C in the direction of thel arrow shown near it in Fig. 2, with a speed which is gradually accelerated by the form of the cams E3 E4. The eccentric sectors F6 and FT of the train of gearing on the other side of the machine remain out of gear with each other until just as the starting-lever is passing out of gear with the sector and the movement of the cylinder is continued through the said The starting-lever is IOC) IIO

sectors, the velocity being gradually accelerated by reason of the eccentric form of the said sectors until the concentric sector F5 comes into gear with the gear-wheel F4, which constantly rotates in the direction of the arrow shown upon it, and the cylinder is thus brought to the same surface speed as the movement of the bed. The cylinders having now been depressed by the toggles and the movement of the bed having been reversed, the rack on the bed runs into gear with it7 and during the movements of the two cylinders thus produced the two printings take place, one on the sheet which has j ustbeen taken to the iirst cylinder C by its grippers.

t from the feed-board and the other on a sheet which has been previously printed on the first cylinder and brought by the grippers on the endless chains from the first cylinder and taken from the chain-grippers to the second cylinder C2 by its grippers t2. The grippers t of the first cylinder take the sheet while the cylinder is stationary, as in an ordinary stop-cylinder press; but the grippers t3 of the second cylinder take the sheets while the said cylinder and the gripper-carryin g chains are in motion.

The grippers tt 2 of the two cylinders may be like those commonly used 0n the impression-cylinders of cylinder printing-machines, and, as the said grippers may be opened by similar cams to those employed for the purpose in ordinary cylinder printing-machines, I have not thought it necessary to represent means for opening said grippers.

The grippers carried by the endless chains or racks V are in two sets, those w of the one set which are for taking the sheets from the iirst cylinder and carrying them to the second intervening between those w2 of the other set, which take the sheets from the second cylinder and deposit them on the receiving-board. The bars of the said grippers are supported in the endless chains or racks in the same manner as those described in my United States Patent No. 319,400, dated June 9, 1885.

The grippers w', which take the sheets from the first cylinder, are opened to take a sheet by means of a stationary cam Z, (see Fig. 4,) secured to one of the standards Vtt, which supports the shaft o* and its Wheels Vi for carrying the endless chains or racks, and are closed by springs, as in grippers commonly employed to take sheets from cylinders.` 'lhese grippers and their operating mechanism may bc the same as those represented in my Letters Patent aforesaid for taking the sheets from the cylinder. The said grippers are opened again to release the sheet when it arrives in proper relation with the second cylinder O2 by passing a stationary cam Z2, (see Fig. 4,) secured upon the standard A2. The

grippers @02, which take the sheet from the second cylinder, are opened for the purpose by passing the same cam Z2 as is employed to open the grippers w', and they are opened again to release the sheet and deposit it on the receiving-board by means of a stationary cam Z3, (see Fig. 4,) secured to one of the standards V2, in which is supported the shaft i; of the wheels V for 'carrying the endless chains or racks.

In order to provide for throwing up the grippers tu? entirely out of the way of the cylinder C and its grippers as they pass the said cylinder, the main bar of the grippers is provided with an arm in, furnished with an anti -friction roller uf, which in passing under a stationary cam Zl causes the said grippers wg to be thrown upward, as illustrated in Fig. 2, where the one pair of grippers in? is shown passing the cylinder and operated by said cam Zt.

The endless chains or racks V are supported between the wheels V and V* on rigid ways IV W, constructed on frames )VL-one on each side of the machine. One of these frames, with the chain-carryin g sh af ts, and one of the wheels on each shaft are separately represented in a side view, Fig. The shaft o at the delivery end of the machine-thatis to say, at the right-hand end of Figs. 2 and 3--is capable of being lifted out of its bearings. The two frames W', containing the ways WV, are connected near the shaft r, at the delivery end of the machine, by a cross-bar IW. By applying a tackle or other hoisting device to the said bar with the end of the frames W', and with them the corresponding shaft fr, the wheels V and the portions of the chains or racks on said wheels may be raised, the frames turning on the shaft c* at the receiving end of the machine, which is at the left hand of Figs. 2 and 3 as a pivot. By' this raising the ways and the gripper-carrying chains or racks and attached grippers access may be had to the cylinders and parts of the machine below. In proper relation to each cylinder there are arranged hiking-rollers I I and distributing-rollers J J, and in proper relation to the place provided on the bed for each form there are arranged distributingtables K. For a lithographie press waterrollers L may also be provided. As these rollers `and tables need not differ from those in single-cylinder printing-machines, no par ticular description of them is necessary. In case of a third cylinder C3 being provided for printing from a third forni T3, as shown in Fig. 7, additional inking-rollers, distributingrollers, and tables will have to be provided.

W'hat I claim as my invention, and desire to secure by Letters Patent, is-

l. The combination of a plurality of impression-cylinders provided with receivinggrippers and geared together to rotate synchronously, a reciprocating form-bed common to all of said cylinders and adapted to carry a number of forms corresponding with the number of said cylinders, a rack on the bed Sio IOO

IIO

for each cylinder, gears upon said cylinders l said cylinders for the purpose of taking sheets from one of said cylinders and transferring them to another, substantiallT as and for the purpose herein set forth.

2. The Combination, With a plurality of impression-cylinders provided With receivinggrippers, a reciprocating form-bed common to all of said cylinders and adapted to carry a number of forins corresponding With the number of cylinders, a rack on said bed for each cylinder, and gears on said cylinders for engaging With said raek for driving said cylinders during printing, of endless racks and gears upon said Cylinders gearing With said endless racks for the purpose of transmitting motion from one cylinder to another While out of gear With the bed-rack and grippers on said endless raoks for taking sheets from one Cylinder and transferring them to another, substantially as and for the purpose herein set forth.

3. The combination, in a printing-machine, with a plurality of impression-cylinders having gears upon thein, endless Chains engaging with said gears above the said cylinders, and carrying grippers for taking sheets from said cylinders7 of tracks upon which said endless ohains run,pivotal supports forsaid tracks at one end, and upwardly-movable supports for the other end of said tracks, substantially as and for the purpose herein set forth.

CALVERT B. COTTRELL. lVituesses:

FREDK. HAYNEs, J oHN BICKET. 

